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dc.contributor.authorRashti, Mehran Rezaei
dc.contributor.authorEsfandbod, Maryam
dc.contributor.authorPhillips, Ian R
dc.contributor.authorChen, Chengrong
dc.date.accessioned2019-06-08T01:32:13Z
dc.date.available2019-06-08T01:32:13Z
dc.date.issued2019
dc.identifier.issn0959-6526
dc.identifier.doi10.1016/j.jclepro.2019.02.013
dc.identifier.urihttp://hdl.handle.net/10072/384895
dc.description.abstractHigh sodicity and Low nutrient retention in bauxite-processing residue sand (BRS) disposal areas restrict sustainable vegetation management in this highly alkaline environment. Although previous investigations have reported the beneficial effect of organic amendments on BRS rehabilitation, little is known about the underlying mechanisms of this complicated process, particularly after supplementary leaching of biochar amended BRS. We have investigated the coupled effect of supplementary leaching process, biochar [aged acidic (AC) vs alkaline pine (PC)] amendment and di-ammonium phosphate (DAP) fertilisation on rhizosphere nutrient dynamic and ryegrass performance in a 116-day glasshouse study. Biochar amendment in DAP + PC and DAP + AC treatments significantly increased and decreased pH (0.3–0.5 units) in all BRS rhizosphere and root-free zones, respectively. The application of alkaline and acidic biochars to BRS have reduced ammonia volatilisation (25–80%) and increased nitrogen retention (9–72%) in comparison with DAP treatment. Supplementary leaching had no significant effect on BRS rhizosphere pH, but reduced the EC values by ca. 62% in biochar-amended treatments. The leachates’ pH remained unchanged (ca. 8) throughout the experiment, while their EC reduced in AC (6 folds) and PC (9 folds) amended treatments, with lower reduction in rhizosphere than root-free zones. The interaction of applied biochars and plant roots generally decreased nutrient leaching from rhizosphere in comparison with root-free zones. Sodium was the dominant cation in the leachate of all treatments and cumulative abundance of exchangeable cations were in the order of Na+ > Ca2+ > K+ > Mg2+ > Al3+. The reduction of BRS salinity has increased plant biomass (ca. 47%) in biochar amended treatments by improving the capacity of fresh BRS rhizosphere for plant establishment.
dc.description.peerreviewedYes
dc.languageEnglish
dc.relation.ispartofpagefrom66
dc.relation.ispartofpageto74
dc.relation.ispartofjournalJournal of Cleaner Production
dc.relation.ispartofvolume219
dc.subject.fieldofresearchEnvironmental Engineering
dc.subject.fieldofresearchManufacturing Engineering
dc.subject.fieldofresearchInterdisciplinary Engineering
dc.subject.fieldofresearchcode0907
dc.subject.fieldofresearchcode0910
dc.subject.fieldofresearchcode0915
dc.titleRhizosphere management by biochar and leaching improved plant performance in fresh bauxite residue sand
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.description.versionPost-print
gro.rights.copyright© 2019 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence, which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorRezaei Rashti, Mehran
gro.griffith.authorChen, Chengrong


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